ArticleScientific reports2025
Evidences of topological nodal line semimetal in Mn
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The non-trivial electronic transport in magnetic topological materials have attracted significant attention. Here, we present evidences of a topological nodal line semimetal in antiperovskite [Formula: see text]GaC along with the experimental studies such as the anomalous Hall effect (AHE), Kondo effect and thermal transport properties (Seebeck and Nernst effects). The upturn in the low-temperature electrical resistivity follows Hamann expression with the Kondo temperature [Formula: see text] = 16 K. The scaling analysis of the anomalous Hall conductivity ([Formula: see text]) suggests that the AHE in [Formula: see text]GaC is primarily governed by coexistence of both intrinsic Berry curvature and skew scattering mechanisms. The experimentally observed value of [Formula: see text] (∼ 50 [Formula: see text]) is close to the theoretically calculated value. The low temperature Seebeck data suggests the presence of significant contribution of electron-magnon scattering, and a large value of Nernst coefficient is consistent with finite Berry curvature effects in [Formula: see text]GaC. The electronic band structure calculations with spin-orbit coupling, shows the formation of a drumhead-shaped surface states, and the existence of finite number of Weyl nodes, in consistence with the experimental findings.
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